const state = {
  visitedViews: [],
  cachedViews: [],
  iframeViews: []
}

const mutations = {
  ADD_IFRAME_VIEW: (state, view) => {
  if (state.iframeViews.some(v => v.path === view.path)) return
state.iframeViews.push(
  Object.assign({}, view, {
    title: view.meta.title || 'no-name'
  })
)
},
ADD_VISITED_VIEW: (state, view) => {
  if (state.visitedViews.some(v => v.path === view.path)) return
  state.visitedViews.push(
    Object.assign({}, view, {
      title: view.meta.title || 'no-name'
    })
  )
},
ADD_CACHED_VIEW: (state, view) => {
  if (state.cachedViews.includes(view.name)) return
  if (view.meta && !view.meta.noCache) {
    state.cachedViews.push(view.name)
  }
},
DEL_VISITED_VIEW: (state, view) => {
  for (const [i, v] of state.visitedViews.entries()) {
    if (v.path === view.path) {
      state.visitedViews.splice(i, 1)
      break
    }
  }
  state.iframeViews = state.iframeViews.filter(item => item.path !== view.path)
},
DEL_IFRAME_VIEW: (state, view) => {
  state.iframeViews = state.iframeViews.filter(item => item.path !== view.path)
},
DEL_CACHED_VIEW: (state, view) => {
  const index = state.cachedViews.indexOf(view.name)
  index > -1 && state.cachedViews.splice(index, 1)
},

DEL_OTHERS_VISITED_VIEWS: (state, view) => {
  state.visitedViews = state.visitedViews.filter(v => {
    return v.meta.affix || v.path === view.path
  })
  state.iframeViews = state.iframeViews.filter(item => item.path === view.path)
},
DEL_OTHERS_CACHED_VIEWS: (state, view) => {
  const index = state.cachedViews.indexOf(view.name)
  if (index > -1) {
    state.cachedViews = state.cachedViews.slice(index, index + 1)
  } else {
    state.cachedViews = []
  }
},
DEL_ALL_VISITED_VIEWS: state => {
  // keep affix tags
  const affixTags = state.visitedViews.filter(tag => tag.meta.affix)
  state.visitedViews = affixTags
  state.iframeViews = []
},
DEL_ALL_CACHED_VIEWS: state => {
  state.cachedViews = []
},
UPDATE_VISITED_VIEW: (state, view) => {
  for (let v of state.visitedViews) {
    if (v.path === view.path) {
      v = Object.assign(v, view)
      break
    }
  }
},
DEL_RIGHT_VIEWS: (state, view) => {
  const index = state.visitedViews.findIndex(v => v.path === view.path)
  if (index === -1) {
    return
  }
  state.visitedViews = state.visitedViews.filter((item, idx) => {
    if (idx <= index || (item.meta && item.meta.affix)) {
    return true
  }
  const i = state.cachedViews.indexOf(item.name)
  if (i > -1) {
    state.cachedViews.splice(i, 1)
  }
  if(item.meta.link) {
    const fi = state.iframeViews.findIndex(v => v.path === item.path)
    state.iframeViews.splice(fi, 1)
  }
  return false
})
},
DEL_LEFT_VIEWS: (state, view) => {
  const index = state.visitedViews.findIndex(v => v.path === view.path)
  if (index === -1) {
    return
  }
  state.visitedViews = state.visitedViews.filter((item, idx) => {
    if (idx >= index || (item.meta && item.meta.affix)) {
    return true
  }
  const i = state.cachedViews.indexOf(item.name)
  if (i > -1) {
    state.cachedViews.splice(i, 1)
  }
  if(item.meta.link) {
    const fi = state.iframeViews.findIndex(v => v.path === item.path)
    state.iframeViews.splice(fi, 1)
  }
  return false
})
}
}

const actions = {
  addView({ dispatch }, view) {
    dispatch('addVisitedView', view)
    dispatch('addCachedView', view)
  },
  addIframeView({ commit }, view) {
    commit('ADD_IFRAME_VIEW', view)
  },
  addVisitedView({ commit }, view) {
    commit('ADD_VISITED_VIEW', view)
  },
  addCachedView({ commit }, view) {
    commit('ADD_CACHED_VIEW', view)
  },
  delView({ dispatch, state }, view) {
    return new Promise(resolve => {
      dispatch('delVisitedView', view)
    dispatch('delCachedView', view)
    resolve({
      visitedViews: [...state.visitedViews],
    cachedViews: [...state.cachedViews]
  })
  })
  },
  delVisitedView({ commit, state }, view) {
    return new Promise(resolve => {
      commit('DEL_VISITED_VIEW', view)
    resolve([...state.visitedViews])
  })
  },
  delIframeView({ commit, state }, view) {
    return new Promise(resolve => {
      commit('DEL_IFRAME_VIEW', view)
    resolve([...state.iframeViews])
  })
  },
  delCachedView({ commit, state }, view) {
    return new Promise(resolve => {
      commit('DEL_CACHED_VIEW', view)
    resolve([...state.cachedViews])
  })
  },
  delOthersViews({ dispatch, state }, view) {
    return new Promise(resolve => {
      dispatch('delOthersVisitedViews', view)
    dispatch('delOthersCachedViews', view)
    resolve({
      visitedViews: [...state.visitedViews],
    cachedViews: [...state.cachedViews]
  })
  })
  },
  delOthersVisitedViews({ commit, state }, view) {
    return new Promise(resolve => {
      commit('DEL_OTHERS_VISITED_VIEWS', view)
    resolve([...state.visitedViews])
  })
  },
  delOthersCachedViews({ commit, state }, view) {
    return new Promise(resolve => {
      commit('DEL_OTHERS_CACHED_VIEWS', view)
    resolve([...state.cachedViews])
  })
  },
  delAllViews({ dispatch, state }, view) {
    return new Promise(resolve => {
      dispatch('delAllVisitedViews', view)
    dispatch('delAllCachedViews', view)
    resolve({
      visitedViews: [...state.visitedViews],
    cachedViews: [...state.cachedViews]
  })
  })
  },
  delAllVisitedViews({ commit, state }) {
    return new Promise(resolve => {
      commit('DEL_ALL_VISITED_VIEWS')
    resolve([...state.visitedViews])
  })
  },
  delAllCachedViews({ commit, state }) {
    return new Promise(resolve => {
      commit('DEL_ALL_CACHED_VIEWS')
    resolve([...state.cachedViews])
  })
  },
  updateVisitedView({ commit }, view) {
    commit('UPDATE_VISITED_VIEW', view)
  },
  delRightTags({ commit }, view) {
    return new Promise(resolve => {
      commit('DEL_RIGHT_VIEWS', view)
    resolve([...state.visitedViews])
  })
  },
  delLeftTags({ commit }, view) {
    return new Promise(resolve => {
      commit('DEL_LEFT_VIEWS', view)
    resolve([...state.visitedViews])
  })
  },
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
